Fastconnect 6900 FirmwareOperating system · Qualcomm

CVE-2025-27044

HIGH · 7.8 CVSS v3.1 Published 2025-07-08
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
80/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Memory corruption while executing timestamp video decode command with large input values.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Memory corruption vulnerability in video decode timestamp handling where large input values are not properly validated, allowing an attacker to trigger out-of-bounds memory access during video decoding operations.

MitigationImplement strict bounds checking on timestamp values before passing to the video decode command; validate that input sizes fall within expected memory allocation limits.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Fastconnect 6900 FirmwareOperating system
Affected:all versions
Fastconnect 7800 FirmwareOperating system
Affected:all versions
Sc8380xp FirmwareOperating system
Affected:all versions
Wcd9380 FirmwareOperating system
Affected:all versions
Wcd9385 FirmwareOperating system
Affected:all versions
Wsa8840 FirmwareOperating system
Affected:all versions
Wsa8845 FirmwareOperating system
Affected:all versions
Wsa8845h FirmwareOperating system
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Qualcomm Fastconnect firmware usage
    Check system or device inventory for devices using Qualcomm Fastconnect 6900 or 7800 WiFi/Bluetooth chipsets. On Linux, this may appear in lspci, lsusb, or kernel module outputs. Review hardware manifests or firmware databases for your managed endpoints.
    Affected if Any endpoint contains Qualcomm Fastconnect 6900 or 7800 firmware
  2. Identify Qualcomm mobile platform firmware usage
    Check for devices using Qualcomm Sc8380xp processors or chipsets. Review device specifications, firmwareSBOMs, or hardware asset lists for systems with this Qualcomm platform.
    Affected if Any endpoint contains Qualcomm Sc8380xp firmware
  3. Identify Qualcomm audio codec firmware usage
    Check for devices with Qualcomm Wcd9380, Wcd9385, Wsa8840, Wsa8845, or Wsa8845h audio codec firmware. These are typically found in smartphones, tablets, or audio subsystems. Query device firmware listings or audio driver information.
    Affected if Any endpoint contains Qualcomm Wcd9380, Wcd9385, Wsa8840, Wsa8845, or Wsa8845h firmware
  4. Verify video decode functionality is in use
    Confirm that video decoding operations are performed on affected devices. Check if video playback, streaming, or video conferencing applications are active. Review process lists or system activity logs for video decode activity.
    Affected if Video decode operations are performed on devices with affected firmware components
  5. Check for timestamp input validation in video pipeline
    If you have access to firmware or driver source code, search for video decode timestamp handling functions. Look for code paths that process timestamp values without proper bounds checking before memory allocation. This typically requires access to the firmware binary or debug symbols.
    Affected if Timestamp values from external input are processed without strict bounds validation before memory operations

If your environment contains any devices with Qualcomm Fastconnect 6900/7800, Sc8380xp, Wcd9380/9385, or Wsa8840/8845/8845h firmware and those devices perform video decoding, the environment is affected.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict bounds checking on timestamp values before passing to the video decode command; validate that input sizes fall within expected memory allocation limits.

Fix this in Fastconnect 6900 Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,800
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Scan for this in your stack

Free · runs locally
dbcve dependency scanner

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-27044 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data